Extension slide device



June 18, 1935. M. WURM EXTENSION SLIDE DEVICE Filed Sept. l, 1934INVENTOR.

ATTORNEY.

Patented June 18, 1935 I y UNITED .STATES PATENT OFFICE l 2,005,213 v KEXTENSION SLIDE DEVICEv Max Wurm, Brooklyn, N. n I application September1, 1934, Serial No. 742,376 p 3 Claims. (Cl. 311-69) My invention isrelated to extension slide members 3, 4 and 5, havingrelativeslidingmovemechanism which is adapted for use with orments longitudinally inthe horizontal. The cendinary` extension tables in which one or moretrai-member 4 is fixed upon a subjacent support, table top-members areslid back and forth in the such as an ordinary bridge or stretcher orother 5, horizontal, and also for use with a shelf or horisuitable-part,which is not here. shown, and, it 5 zontal ledge. Some of the importantfeatures 0f servesjas a guide and support for the two rasthe inventionare, that simplicity of construction sociated side-members 3 and 5,which are mountis obtained; that the peculiar construction and ed toslide upon the opposite sides of the centralarrangement of the guidefixtures maintain the y member; the member or section 3 being securedsliding members parallel and retain them against by screws E to theunderside of the top-member 10 vertical movement so that they keep thesame 2, and the member or section 5 being secured by level; that theguide fixtures also serve as gaging screws 1 to the underside of topmember I. means for setting and positioning the fixtures Theside-members 3 and 5 are constructed and parallel and in -a1inement;that outwardly prooperate alike so that a description of one willjecting stops may be conveniently provided atthe serve for both, thesame reference numeral bel5 respective ends of the sliding-members; thatthe ing used for member 3 but with a prime mark device may be madeentirely of metal or partly thereon. The member 5 is a channel-iron withof metal and partly of wood, and the metal parts aflat back 8 slidingalong the side of the central-v made from angle or channel-irons; thatit may member 4 with its upper right-angled iiange 9 be manufactured atrelatively low cost, and that attached to the underside of top-memberI.by 20 itsv structure and arrangement is such that the screws I. TheYlower flange I!) of member 5 is manufacturer need only produce andkeepin Stock narrower than the upper flange and forms a about threedifferent sizes and will be able to'exguide-rib which slides back andforth in guidetend such sizes to any desired extension by merely ways orgrooves I I and I2 formed in the fixtures moving a guide-fixture to theright or left in or brackets I3 and I4, respectively, which are se- 25order to increase or decrease the extension of cured by screws- I5 andI6, respectively, to the the slides. Other advantages of my improvedsidey of the central-member 4, as indicated in slide device will beunderstood from the detailed Figs. 2 and 3. l A description hereinaftergiven inv connection with The xturesv I3 and I4 are spaced apart acerthe drawing herein. tain distance and the latter isengaged by a fixed30 I have illustrated types of my invention in the Stop I1 'which isformed at the inner end of side accompanying drawing, wherein; member 5by a bent extensionl of the guide-rib Figure l shows a top plan view ofan extension I il, and the xture I3 is engaged by an outwardly tableembodying my improvements, the form of projecting stop I8, which isstruck up from the the slide being of the equalizing kind, and only backportion 8 of the member 5, as shown in Fig. 35 one longitudinal half ofthe table being shown. 2. These stops, by engaging or colliding withFigure 2 shows an enlarged vertical sectional the sides of therespective fixtures, act to limit View of the structure shown in Fig. 1,the plane of the range 0f relative IOIEIldIIa-l mOVement 0f the sectionbeing indicated by the broken-line the sliding member 5; ythe stopsbeingformed 22, in Fig. l. integral with said member. 40

Figure 3 shows an enlarged vertical cross-sec- The `fixtures or bracketsI3 and I4 may be tionalview of the structure shown in Fig.2 the formedfrom suitable sheet-metal, likewise the plane of the section beingindicated by the side-members 3 and 5and they are so shaped asbroken-line 3 3, in Fig. 2. to pass upwardly around the guide-rib I0 ofslid-4 Figures 4, 5 and 6 show cross-sectional views ing member 5 withthe upwardly extending flat 45 similar to Fig. 3, but of differentmodifications part engaging the side of said member to provide of thethree membered slide. a suitable guiding means for the same, and theReferring to the drawing, in which like nuxtures serve to preventvertical movement of merals of reference designate like parts throughtheSliding Sdememb1`5 and keep them on the out, and considering thestructure shown in Figs. same level, and also act to prevent lateral or1, 2 and 3, I and 2 indicate two cooperating table. wabbling movement ofsaid members. top members which are Vadjustable toward and An importantfeature of the guide-fixtures is away from each other horizontally tovary the the provision of positioning-means therefor, length of thetable in the usual way. In this which consists of an inwardly projectingilange form, my device consists in three juxtaposed I9 on fixture I4taking intoa horizontal slot or cut 20 formed in the side ofcentral-member 4, and a similar flange 2I on fixture I3 taking into aslot 22 in the side of member 4, the slots 20 and 22 being in horizontalalinement. By means of this simple construction, the guide way fixturesmay be mounted in their true positions with certainty of parallelism andalinement on the central member, so that the parts may be assembledquickly without necessitating the taking of measurements in order to getthe xtures in their proper places, since they are practically duplicatesand the positioning-flange and guide way of each are the same distanceapart vertically. If preferred, in all of the forms, the two iixtures orbrackets I3 and I4, may be merged into one long bracket covering thehorizontal distance of the two separate brackets, the rectilinearmovements of the sliding members being the same in each form.

In the form shown in Figs. 1, 2 and 3, the device is constructed withequalizing means comprising a rack 23 formed in the back of side-member5 and a similar rack`23 formed in side-member 3, with an intermeshingcog-wheel 24 turning on a vertical pivot 25 on the upper face of thecentral member 4, so that the slides move longitudinally andsimultaneously in opposite directions the same distance, in a mannerwell known. The bracket I4 has its upper edge cut-away at 26, to clearthe teeth of the cog-wheel.

In the modified form shown in Fig. 4, which may be of the equalizingtype or not, the structure `is the same as that shown in Figs. 1 toy 3,with the difference that instead of having the gage ange I9 thereofforced into a slot in the central member, this flange I9a of bracket I4atakes under the lower edge of central-member 4a and a screw I6a securesthe bracket to the member.

In the modified form shown in Fig. 5, the sliding side-member b is likethat of the previously described forms, but its cooperating bracket orfixture I4b is bent back on itself in a U-shape, the inner limb beingcarried up above the central-member 4b with the positioning-flange I9bextending over the top edge thereof, and the outer limb forming a grooveI2b to guide the lower edge of the sliding member 5b, as previouslydescribed.

In the modification shown in Fig. 6, the construction is the same asthat of Figs. 1 to 3, the sliding side-member 5c cooperating with thefixture I4c in the same way, but the gage-flange at the foot of thexture is omitted and a gage screw I5c is used to secure the xture to theside of central-member 4C.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:--

1. An extension slide device comprising a unit of three juxtaposedmembers having relative longitudinal sliding movement, the central oneof which serves as a xed guide-member for each of the engaging slidingside-members and the latter being provided with outwardly extendingguideribs, guide-fixtures provided with inwardly disposed guide-waysengaged by said guide-ribs, said fixtures being mounted on said centralmember below and exteriorly of said side-members and serving to guidethe side members in parallel longitudinal movement Fand in the samehorizontal plane.

2. An extension slide device comprising a unit of three juxtaposedmembers having relative longitudinal sliding movement, the central oneof which serves as a xed guide-member for each of the sliding sidemembers and the latter being provided with outwardly extendingguide-ribs, guide-xtures provided with inwardly disposed guide-Waysengaged by said guide-ribs, said lixtures being mounted on said centralmember below and exteriorly of said side-members and serving to guidethe side-members in parallel longitudinal movement, and means on thelower part of each xture adapted to engage said centralmember andserving as positioning means to set the guide-Way of each fixture inhorizontal alinement on said central member.

3. An extension slide device comprising a unit of three juxtaposedmembers having relative longitudinal sliding movements, the central oneof which serves as a. fixed guide member for each of the sliding sidemembers, each side member consisting of a channel-iron having outwardlyextending ilanges with its back opposite to and.

in sliding relation with said central member and with its lower flangeserving as a guide-rib, one or more brackets or fixtures mounted uponeach side of said central member and provided with guide grooves or Waysfor receiving the guideribs of said side members, and the upper flangeof each said channel-iron serving as an attaching part to the under sideof a table top member.

MAX WURM.

